小编Jav*_*oob的帖子

当我使用java.util.Arrays.sort(numbers); Am我做错了什么时代码有效吗？这对我来说似乎很奇怪.

import java.util.Arrays.*;

class Test {
   public static void main(String[] args) {
    double[] numbers = {6.0, 4.4, 1.9, 2.9, 3.4, 3.5};
    char[] chars = {'a', 'A', '4', 'F', 'D', 'P'};

    sort(numbers);

    System.out.println(binarySearch(numbers, 3));

   }
}

(终端显示错误)

Test.java:8: error: cannot find symbol
    sort(numbers);
    ^
symbol:   method sort(double[])
location: class Test
 Test.java:10: error: cannot find symbol
    System.out.println(binarySearch(numbers, 3));
                       ^
 symbol:   method binarySearch(double[],int)
 location: class Test
  2 errors

/**
*@param context
*@param attrs
*/
Public DotView(Context context, Attribute attrs) {
     super(context, attrs);
     setFocusAbleInTouch(true);
}

@param是否适用于任何目的.我在Android编程书中看到了这段代码,但作者没有解释@param的含义.我知道它在双线评论中,所以我假设@param对结果没有任何作用,它是为了可读性.我是对还是错？

import java.util.Scanner;
import java.util.Arrays;

class Test {
   public static void main(String[] args) {

    Scanner input = new Scanner(System.in);
    System.out.println("Enter the amount of numbers to be checked for sort");
    int amount = input.nextInt();

    int[] list = new int[amount];
    for (int i = 0; i < list.length; i++) {
        System.out.print("Enter a number: ");
        list[i] = input.nextInt();
    }

    // Print the original array
    printArray(list);

    // list2 will contain the sorted list of elements
    int[] list2 = sortArray(list);
    printArray(list2);

    // Print the results
    if …

import javax.swing.*;

public class Test {
   public static void main(String[] args) {
     JButton jbtOK = new JButton("OK");
     JButton jbtCancel = new JButton("Cancel");
     JLabel jlblName = new JLabel("Enter your name: ");
     JTextField jtfName = JTextField("Type Name Here");
     JCheckBox jchkBold = new JCheckBox("Bold");
     JCheckBox jchkItalic = new JCheckBox("Italic");
     JRadioButton jrbRed = new JRadioButton("Red");
     JRadioButton jrbYellow = new JRadioButton("Red");
     JComboBox jcboColor = new JComboBox(new String[] {"Freshman",
       "Sophmore", "Junior", "Senior"});
     JPanel panel = new JPanel();
     panel.add(jbtOK);
     panel.add(jbtCancel);
     panel.add(jlblName);
     panel.add(jtfName);
     panel.add(jchkBold);
     panel.add(jchkItalic);
     panel.add(jrbRed);
     panel.add(jrbYellow);
     panel.add(jcboColor); …